Method of contouring the edge of contact lenses

Details Method of contouring the edge of contact lenses Method of contouring the edge of contact lenses

1985-03-25

1986-03-25

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Rotational molding

51284E, 264 25, 264 27, 425808, B29D 1100

Patent

active

045782300

ABSTRACT:
A method of rounding the edge of spin cast contact lenses by cutting a concave peripheral curve which intersects both the concave and convex lens surfaces and the lens mold. The lens material polishes away at a slower rate than the mold material providing an uneveness between the lens edge and the mold and provides a rounded contour on the lens edge.

REFERENCES:
patent: 2663663 (1953-12-01), Weltman et al.
patent: 2990664 (1961-07-01), Cepero
patent: 3430391 (1969-03-01), Borish
patent: 3660545 (1972-05-01), Wichterle
patent: 4155962 (1979-05-01), Neefe

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